I have done that recharge. I will update here as I got this benefit. Because customer care said that it will take time to update this offer. I will get this benefit in 48 hours.
After recharge i got massage that 'Request for activating airtel digitalTV long duration pack could not be processed due to technical reasons. Pls call 079-44448080 288108965'
After that I call Customer care and he said that if u get call from us for this offer you will get this benefit in next 48 hours.
Hope that it would be done